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2012 PIP ABS Traction lights on no regen.

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by terpsmandan, Jun 19, 2021.

  1. terpsmandan

    terpsmandan Member

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    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    2012 PIP at 180k. It will drive normal for about 2-3 miles and then the the ECO/POWER light on the HSI will flash and the ABS-Traction lights will light up and the Regen braking stops working. CC works fine. I read that this may be a failure of the Skid Control ECU which is part of the Master Cylinder assembly. Is that where I should start looking? Thanks.
     
    #1 terpsmandan, Jun 19, 2021
  2. ChapmanF

    ChapmanF Senior Member

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    Vehicle:
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    IV
    It is certainly some issue being reported by the skid control ECU, which is what controls those lights. Calling it a "failure" of that ECU is nearly always a shoot-the-messenger mistake: the ECU will nearly always turn out to be working fine and just doing its job to tell you about some actual issue that you ought to know about.

    You should proceed directly to finding out what it wants to tell you. If you don't have an OBD-II code scanner, you can get the trouble codes by using a short jumper wire and counting blinks on the dash lights, as numerous PriusChat posts describe.
     
    #2 ChapmanF, Jun 19, 2021
  3. bisco

    bisco cookie crumbler

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    if you're going to diy, a mini vci is well worth the time and trouble
     
    #3 bisco, Jun 19, 2021
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